Double knot netting and method of making the same



June 1952 M. GRABOWSKY ETAL 3,039,348

DOUBLE KNOT NETTING AND METHOD OF MAKING THE SAME Filed Aug. 16, 1960 INVENTORS United States Patent 3,039,348 DOUBLE KNOT NETTING AND METHOD OF MAKING THE SAME Murray Grabowsky and Paul Paradis, Menominee, Mich., assignors to The Fish Net and Twine Company, Menominee, Mich., a corporation of Illinois Filed Aug. 16, 1960, Ser. No. 50,017 3 Claims. (Cl. 87-12) This invention relates to a new and improved double knot netting which includes a new and improved knot, and the method of making the knot in the netting.

Knots for netting made of natural fibers have been used for a long time and the knots have been highly effective and efficient. The advent of synthetic materials has brought forth problems into netting, in that the synthetic materials do not have the multitudinous ends protruding from the cord which makes up the net to prevent slippage, but rather the synthetic materials provide a smoother surface which is more prone to allow slippage or twisting of the knot relative to the netting. It is appreciated that twisting of the knot in a netting distorts the netting and in some instances produces undue wear on the netting in usage of the netting. Therefore, it is the principal object of the present invention toprovide netting with knots which do not twist or rotate when a load is applied to the netting.

It is another object of the hereindisclosed invention to provide a knot for use in netting which knot holds synthetic material and the slippage is at a minimum.

It is another object of the present invention to provide a method of making netting embodying the improved knot.

It is a still further object of the hereindisclosed invention to provide a method of making a double knot which double knot securely holds two cords together with which 'cords are made of a synthetic material without twisting or rotation of the knot.

Other objects and uses of the hereindisclosed invention will become readily apparent to those skilled in the art upon a perusal of the appended specification in light of the drawing in which:

FIGURE 1 is a plan view of a portion of netting embodying the present invention with the knots shown loose for purposes of illustration;

FIGURE 2 is a view of a knot embodying the present invention which knot is shown loose in order to better show the portion of the strands in the knot;

FIGURE 3 is a plan view of the knot shown in FIG- URE 2 but with force applied to the knot to tighten the knot so that the knot is in a partially tightened attitude; and

FIGURE 4 is a plan View of the knot shown in FIG- URE 3 but with the knot tightened to its fully tightened or closed attitude.

Referring now to the drawing and especially to FIG- URE 1, it may be seen that a portion of the netting generally indicated by numeral consists of a plurality of creel threads 12 and shuttle threads 14 which are tied together by substantially identical knots which are identified as 16a, 16b, 16c, 16d, 16e, 16f, and 16g. The knots 16a, 16 and 16s are identical and comprise one group of knots, and the knots 16b, 16c, 16d, and 16g are identical to each other and comprise a second group of knots. It is clear from the drawing that the only difference between the first-mentioned group of knots and the second-mentioned group of knots is that one group is made in one direction and the other group is made in the opposite direction. It may be seen that knots 16b, 16c, and 16d are in one line and the knots in adjacent lines are made in the opposite direction. This arrangement prevents twisting or binding of the threads in the weaving operation.

Considering now the specific construction of knot 16a, it may be seen that the creel thread 12 is formed in a closed loop 18 with an upper leg 20 and a lower leg 22 extending from the loop 18. The shuttle thread 14 also includes a loop 24 which extends through loop 18 and is looped around leg 22. The loop 24 includes a sub-loop 26 which also passes around leg 22. The loop 24 has a lower leg 28 which extends away from the loop 24 and under an upper leg 30.

The knot 16a is made by forming by net making machinery in the following manner. First the creel thread 12 is formed in a large closed loop with one leg being parallel to the other leg of the loop. The loop is then twisted degrees to form a second loop 18. The leg of the creel thread, which is leg 22 of the knot, is passed diagonally over the loop 18 and the shuttle thread is then brought up through the loop '18. The creel thread is then brought into engagement with the shuttle thread and the shuttle thread is then brought over the creel thread and down through the loop to form a loop over the leg 22 through loop '18. The creel thread is then again moved diagonally across the loop and the shuttle thread is brought up through loop 18 to close the loop over the leg 22 and the creel thread is moved into engagement with a second portion of the shuttle thread. The creel thread is moved back to its original position and the shuttle thread is then brought down over the creel thread and through the loop 18 to complete loop 24 with subloop 26 around leg 22. The loop 18 is then rotated 180 degrees back to its original position and the forming of the knot is thus completed, as may be seen in FIGURE 2. The knot is finally tightened to bring it to its full closed attitude as shown in FIGURE 4.

It may be appreciated that each knot in line with knot 16a is made in the same fashion. The next line of knots, which are represented as 1611, 16c, and 16d, are made in the same fashion; however, the original twisting of the loop is in the opposite direction. Thus, the forming of the net provides a self-balancing feature so that the net remains straight.

It should be noted that the creel thread has a closed loop and the shuttle thread passes through the loop from beneath the loop, over the inner section of the legs of the creel thread, around the lower leg 22 twice and then the shuttle thread passes over itself and into the loop 18. Thus, the interacting loops are closed loops so that there is a minimum opportunity for slippage and the loop of the shuttle thread is a double loop on the leg of the creel thread loop. It may be seen in FIGURE 4 how the final knot presents a very small knot which lies substantially flat and has no tendency for twisting when a load is applied to the knot. The aforementioned feature reduces the wear on the net substantially. Furthermore, the knot is simple to make, thereby providing a simple means for manufacturing the netting.

Although the terms above and below and upper and lower have been used in the foregoing description, it is expressly understood that these terms are purely relative to the instant disclosure and are variable depending on how the knot and netting is oriented and the terms have been used only for purposes of description and illustration and in no way tend to limit the invention or the use thereof. The present knot and netting are particularly adaptable for use with synthetic fibers and especially nylon where the problem of slippage is substantial. Although this knot is particularly used with nylon, it is expressly understood that this is not a restriction on this particular invention. However, the present invention may be used with any other synthetic materials or natural maa terials which have been used in netting for a long period of time.

While a preferred netting and knot and method of making the same has been particularly described herein, it is expressly understood that this in no Way limits the invention. It is readily apparent that those skilled in the art will find means for using the hereindisclosed invention without departing from the spirit and scope of the invention. This invention is limited only to the limitations expressed in the appended claims.

What is claimed is:

1. A net formed from a series of threads knotted together at intervals, each. knot being formed from a first and a second thread, a closed loop being formed in the first thread with a pair of legs leading away therefrom, said second thread positioned through the loop of the first thread and having a portion forming a closed loop around one of the legs of the first thread, said portion of the second thread forming a closed loop having a subloop formed therein and around said leg of the first thread.

2. A method of forming a knot in netting between a first strand and a second strand comprising; forming a closed loop in the first strand with a pair of legs extending from the closed loop, twisting a second loop into the first-mentioned closed loop, positioning one of the legs of the first strand adjacent to the second loop, passing the one end of the second strand through the second loop, forming a closed loop with the second strand on said leg of the first strand, returning said end of the second strand through the second loop in the first strand, and untwisting the first strand.

3. A method of making netting by tying knots between creel threads and shuttle threads, each of the knots being made between a creel thread and a shuttle thread in the steps comprising; forming a closed loop of the creel thread having a first and a second leg oppositely extending, twisting a second loop into said loop, passing the first leg of said creel thread across the second loop, passing the shuttle thread through the second loop, returning the first leg of the creel thread and placing the creel thread in engagement with the shuttle thread, passing the shuttle thread over the first leg of the creel thread and returning the shuttle thread through the second loop, passing the first leg of the creel thread across the second loop again, passing the shuttle thread through the second loop again, returning the first leg of the creel thread, passing the shuttle thread over the first leg of the creel thread again and returning the shuttle thread through the second loop, untwisting the creel thread, and tightening the knot.

References Cited in the file of this patent UNITED STATES PATENTS 621,890 Adams Mar. 28, 1899 621,891 Adams Mar. 28, 1899 2,162,115 Pauls June 13, 1939 2,438,537 Carter Mar. 30, 1948 

